What is a niche of Dragon Dance Mega Tyranitar? I honestly don't understand (or realize) what is so good about it. I know the bulk aids in setting up but...
...it needs Celesteela and Landorus-T gone or weakened, and its dual STAB is kinda unreliable. Stone Edge, as everyone knows, is lackluster in accuracy and PP, while Crunch doesn't hit too many things supereffectively. I feel like Mega Tyranitar is at most decent sweeper that requires tons of team support that can't do too much in return. I think it is outclassed by Mega Gyarados, which has Mold Breaker to defeat conventional physical walls, regular Gyarados / Dragonite / Salamence which can snowball and have access to Z-move, Zygarde which has insane coverage, and Mega Charizard X which has nasty Stealth Rock weakness but has much more limited counterplay.